I took SSRIs for about a year when I was 18-19. At the time I had a diagnosis of social anxiety and I was prescribed Prozac. I think it's similar to Luvox in how it acts?
Anyway, taking Prozac resulted in me spending a lot less time stuck in my daydreams. I don't know if it's because of the way it affected my brain or because it helped change a situation that was causing me to spend a lot of time withdrawn. Basically Prozac made me a lot more outgoing and I found I could talk to people at school. I wasn't alone all the time at school and would get invited to hang out during the weekends....so that meant less time spent daydreaming, and I guess I didn't feel the need to be in my imaginary world to make up for the social interactions I needed.
Prozac completely changed my sleeping patterns. I would spend a few hours making up scenarios in my head every night before falling asleep. Prozac made it so I would just fall asleep right away even if I was trying to stay up and daydream.
I went back to my old habits shortly after stopping taking Prozac. I think that an SSRI prescription without therapy to learn some different coping skills is useless.
Are you about trying SSRIs? I think everyone responds to these prescriptions differently and there can be benefits depending on what your MD is helping you cope with, but you should definitely look into the side effects and take an SSRI while you follow some kind of therapy plan.
I'm currently taking mirtazapine, which is an antidepressant, though I don't think its an SSRI, and I don't think its making much of a difference on my daydreaming. I mean, sure, I've been more aware of my daydreaming the past year or so (I've taken mirtazapine since November 2017), but I think that its probably from doing mindfulness and also just teaching myself to me more aware of my thought patterns and how they affect my actions.
Don't give up what you want most for what you want now.
I have taken Lexapro, which is an SSRI, for depression. I am no longer using it as my depression has been under control for a few years. I don't recall it having had any significant affect on my daydreaming. Then again, I wasn't looking for it to have an affect on daydreaming, just on the depression which it did help.
I would think that serotonin is not the neurotransmitter involved in MDD. I would think more dopamine. I don't know if it has ever been used for MDD, but I would think a medication like selegiline might be more effective for MDD. It would be great if there were a doctor here that could comment.